DSL phone line
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Posted by Stumpy on May 5, 2008, 10:58 am
Please log in for more thread options on the handsets in the house and also on the cord going to the computer modems. When we try to receive faxes only one of the computers will even attempt to "answer" the call. Is it possible that the two middle wires that we are using on the wires running through the house are reversed on the non-functioning modem? Both computers could previously do this. The suspect line can operate a telephone no problem. Seems odd to work on one, but not the other. The junction box on the exterior of the house has red to red and green to green, haven't yet figured out which connection goes to which outlet. Should I randomly try reversing some wires or does it even matter? | ||||||||||||||||||||||||||||||||||||||||
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Posted by BobW on May 5, 2008, 1:41 pm
Please log in for more thread options The polarity of a home phone line hasn't mattered since the early 60s. You have some other problem like a broken connection through some of the filters. Try putting a phone where one of the non-answering computers is connected and see if the line is really getting through that particular filter. Bob -- == NOTE: I automatically delete all Google Group posts due to uncontrolled SPAM == | ||||||||||||||||||||||||||||||||||||||||
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Posted by Stumpy on May 5, 2008, 2:00 pm
Please log in for more thread options >> The suspect line can operate a telephone no problem. Seems odd to work
>> on one, but not the other. The junction box on the exterior of the house >> has red to red and green to green, haven't yet figured out which >> connection goes to which outlet. Should I randomly try reversing some >> wires or does it even matter? >
> The polarity of a home phone line hasn't mattered since the early 60s. You > have some other problem like a broken connection through some of the > filters. Try putting a phone where one of the non-answering computers is > connected and see if the line is really getting through that particular > filter. > > Bob > I did and it does. I also swapped the filters and it did not make a difference. Both computers are similar and I think have the same modem. | ||||||||||||||||||||||||||||||||||||||||
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Posted by Jamie on May 5, 2008, 6:41 pm
Please log in for more thread options Stumpy wrote:
> We just switched over to DSL from modem on home computers. Put DSL filters
The polarity could be an issue, answering, automation machines like
> on the handsets in the house and also on the cord going to the computer > modems. When we try to receive faxes only one of the computers will even > attempt to "answer" the call. Is it possible that the two middle wires that > we are using on the wires running through the house are reversed on the > non-functioning modem? Both computers could previously do this. The > suspect line can operate a telephone no problem. Seems odd to work on one, > but not the other. The junction box on the exterior of the house has red to > red and green to green, haven't yet figured out which connection goes to > which outlet. Should I randomly try reversing some wires or does it even > matter? > > Faxes and the like used to detect the phone polarity to indicate an on/off hook on the other end. the polarity used to flip when the party on the other end picked up the line and when they drop the line, your polarity would switch back. This is how answering machines can detect you dropping the line and not complete the answering message. I don't know if your fax machine is actually detecting this. It may think it's already connected. -- http://webpages.charter.net/jamie_5" | ||||||||||||||||||||||||||||||||||||||||
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Posted by Lord Garth on May 5, 2008, 6:37 pm
Please log in for more thread options
> Stumpy wrote:
> >> We just switched over to DSL from modem on home computers. Put DSL
>> filters on the handsets in the house and also on the cord going to the >> computer modems. When we try to receive faxes only one of the computers >> will even attempt to "answer" the call. Is it possible that the two >> middle wires that we are using on the wires running through the house are >> reversed on the non-functioning modem? Both computers could previously >> do this. The suspect line can operate a telephone no problem. Seems odd >> to work on one, but not the other. The junction box on the exterior of >> the house has red to red and green to green, haven't yet figured out >> which connection goes to which outlet. Should I randomly try reversing >> some wires or does it even matter? > The polarity could be an issue, answering, automation machines like Faxes
> and the like used to detect the phone polarity to indicate an > on/off hook on the other end. > the polarity used to flip when the party on the other end picked up > the line and when they drop the line, your polarity would switch back. > This is how answering machines can detect you dropping the line and > not complete the answering message. > > I don't know if your fax machine is actually detecting this. It may > think it's already connected. These polarity changes have been designed out of newer switching systems since the early 80's....however, if the CO is old, it will work as described. | ||||||||||||||||||||||||||||||||||||||||
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> filters on the handsets in the house and also on the cord going to the
> computer modems. When we try to receive faxes only one of the computers
> will even attempt to "answer" the call. Is it possible that the two
> middle wires that we are using on the wires running through the house are
> reversed on the non-functioning modem? Both computers could previously do
> this. The suspect line can operate a telephone no problem. Seems odd to
> work on one, but not the other. The junction box on the exterior of the
> house has red to red and green to green, haven't yet figured out which
> connection goes to which outlet. Should I randomly try reversing some
> wires or does it even matter?